Android:将图像保存到存储

问题描述

目前，我的应用程序正在拍照，然后将数据放入ImageView中.

Currently my application, takes a photo, and put's the data into a ImageView.

public void openCamera() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
    }
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        Bundle extras = data.getExtras();
        Bitmap photo = (Bitmap) data.getExtras().get("data");
        imageView.setImageBitmap(photo);
    }
}

现在，我希望它执行此操作:当用户单击保存按钮"按钮时，我希望将其保存到存储中.我该怎么办?我使用OnClick侦听器设置了按钮.

Now, i want it to do this: When the user clicks the button 'Save Button' I would like it to save to storage. How would i do this? I have my button set up with an OnClick listener.

public void save_btn() {

}

推荐答案

步骤1:按住Bitmap某处

步骤2:单击该按钮时，派生一个后台线程，AsyncTask，IntentService等进行工作

Step #2: When the button is clicked, fork a background thread, AsyncTask, IntentService, etc. to do the work

步骤3:在后台线程(或任何其他线程)中，在Bitmap 上调用compress()，在要写入的任何文件上提供OutputStream

Step #3: In the background thread (or whatever), call compress() on the Bitmap, providing an OutputStream on whatever file you want to write to

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